AGO Flugzeugwerke was a German aircraft manufacturing company from 1911 until 1945. The initials AGO stood for Apparatebau GmbH Oschersleben. At its peak, the company employed around 4,500 people. It was founded in 1911 in Munich as Flugmaschinenwerke Gustav Otto by Gustav Otto , the son of Dr Nikolaus Otto, inventor of the four-stroke engine. Gustav Otto help German pilot licence No. 34 and was the first Bavarian manufacturer of aircraft. After the outbreak of World War I, AGO built a series of military reconnaissance aircraft, beginning with the AGO C.I, a pusher-powered biplane designed by the swiss A. Haefeli.
In 1916, Gustav Otto opened a new plant in Oschersleben (with Josef Schnittisser) again named AGO, this time for Aktiengesellschaft Gustav Otto. The Oschersleben plant was used to manufacture components for other manufacturers' aircraft until the end of the war. After the war, in the 1920s, the company failed.
Resurrected by the Nazi government in the mid 1930s, the factory produced Arado Ar 65 fighters, Arado Ar 66 trainers, Heinkel He 51 fighters. In the late 30s, it produced Henschel Hs 123 dive-bombers, Gotha Go 145 trainers, Arado Ar 96, and Henschel Hs 126 reconnaissance aircraft. This latter order was increased to 390 units in Summer 1938. From 1941 onwards, the Focke-Wulf Fw 190 became the mainstay of AGO's production.
From 1943 onwards, due to its key role in producing the Fw 190 the AGO factory came under attack by Allied bombing raids, suffering increasingly heavy damage up to the end of the war. In 1947, the last remains of the factory were blown up by the Red Army.